docs: def sample(self, size=1):
          """Generate samples of the random variable.
  
          Parameters
          ----------
          size : int
              The number of samples to generate.
  
          Returns
          -------
          :obj:`numpy.ndarray` of float
              The samples of the random variable.
          """
          samples = scipy.stats.multivariate_normal.rvs(self.mu, self.sigma, size=size)
          return samples